Long COVID: Treatments, Evidence, and Emerging Options Explained
Long COVID (also known as post-COVID condition) can leave people struggling with persistent symptoms long after the initial infection has resolved. These symptoms may fluctuate, affect multiple body systems, and significantly impact quality of life.
- 😴 Fatigue and post-exertional symptom worsening
- 🧠 Brain fog and poor concentration
- 😮💨 Breathlessness
- ❤️ Palpitations and dizziness
- 😣 Chronic pain and sleep disturbance
Long COVID describes symptoms that persist four weeks or more after COVID-19 infection. Symptoms can last months or even years, and may occur even after a mild initial illness.
🔬 What science now tells us about Long COVID
High-quality research and international reviews now show that Long COVID is usually not caused by ongoing viral infection.
- 🔥 Persistent inflammation
- ⚙️ Ongoing immune signalling (IL-6 and JAK-STAT pathways)
- 🪫 Immune exhaustion
- 🔄 Disruption of energy and stress-response systems
Long COVID is increasingly understood as a biological condition driven by chronic inflammation and nervous system dysregulation, rather than persistent coronavirus infection.
⚠️ Why treating Long COVID is challenging
There is currently no single proven cure for Long COVID. This is because:
- Long COVID is heterogeneous
- Multiple biological systems may be involved
- The evidence base is still evolving
Many proposed treatments for Long COVID are experimental, and some carry significant risks. Any intervention should be considered carefully with specialist advice.
📊 Long COVID treatments: what does the evidence say?
| Treatment | Why it’s considered | Level of evidence | Key risks / limitations |
|---|---|---|---|
| Paced rehabilitation | Improves function and breathlessness when symptoms and post-exertional malaise are respected | Moderate (BMJ living review) | Symptom flares if over-paced |
| Anticoagulants | Microclot and endothelial dysfunction hypothesis | Uncertain (trials ongoing) | Bleeding risk, drug interactions |
| Colchicine | Anti-inflammatory (inflammasome pathway) | RCT negative | GI upset, myopathy, interactions |
| Antihistamines (H1/H2) | Mast-cell and immune modulation hypothesis | Low / emerging | Sedation (drug-specific) |
| Nicotine patches | Cholinergic and autonomic nervous system hypothesis | Very low | Palpitations, nausea, dependence |
| Stellate ganglion block (SGB) | Reduces sympathetic overactivity and autonomic dysregulation | Low–moderate (observational) | Rare injection-related risks |
| Blood apheresis / plasma exchange | Removal of inflammatory mediators or autoantibodies | Conflicting | Line complications, cost, bleeding risk |
| Hyperbaric oxygen therapy | Neuro-recovery and tissue oxygenation hypothesis | Mixed | Ear/sinus barotrauma |
| Low-dose naltrexone (LDN) | Neuroimmune and microglial modulation | Low (trials ongoing) | Sleep disturbance; avoid with opioids |
✔ Strongest support: symptom-aware rehabilitation
🟡 Promising but evolving: antihistamines, LDN, autonomic-targeted treatments
🔴 Limited/conflicting evidence: anticoagulants, nicotine, apheresis
🔁 The autonomic nervous system and Long COVID
Many Long COVID symptoms overlap with autonomic nervous system dysfunction, where the body becomes stuck in a prolonged fight-or-flight state.
Autonomic dysregulation can amplify fatigue, pain, poor sleep, palpitations, and brain fog — even when routine tests appear normal.
💉 Stellate Ganglion Block (SGB): where does it fit?
A stellate ganglion block is an ultrasound-guided injection that temporarily reduces excessive sympathetic nervous system activity.
- 🧠 Brain fog
- 😴 Sleep disturbance
- ❤️ Palpitations
- 😮💨 Fatigue
Patients with prominent autonomic symptoms, poor sleep, brain fog, and persistent stress-response activation may be more likely to respond.
🌟 Our experience at Pain Spa
At Pain Spa, Dr Krishna has extensive experience performing ultrasound-guided stellate ganglion blocks, including for patients with Long COVID.
• Careful patient selection
• Fully image-guided technique
• Evidence-informed counselling
• Integrated into a broader treatment plan
🌱 In summary
✔ Chronic inflammation and autonomic imbalance are key contributors
✔ Evidence is growing — but caution is essential
✔ Specialist treatments may help the right patient at the right time
If Long COVID symptoms are affecting your quality of life, a specialist assessment can help clarify which treatment options may be appropriate for you.
At Pain Spa, we take an evidence-informed and individualised approach to Long COVID, recognising that no single treatment is appropriate for everyone. Many patients experience symptoms driven by a combination of chronic inflammation, nervous system sensitisation, and autonomic dysfunction, particularly prolonged sympathetic (“fight-or-flight”) activation.
For carefully selected patients with prominent autonomic symptoms — such as palpitations, sleep disturbance, brain fog, heightened stress responses, or fatigue — specialist interventions such as ultrasound-guided stellate ganglion block (SGB) may form part of a broader management strategy. Observational studies and clinical experience suggest that SGB can help modulate excessive sympathetic activity and, in some patients, lead to meaningful symptom improvement.
SGB is not a cure for Long COVID and is not suitable for all patients. At Pain Spa, SGB treatment is offered only following careful assessment, clear discussion of the current evidence and limitations, and as part of a comprehensive, multidisciplinary approach focused on safety, realistic expectations, and long-term functional improvement.